WS double girder overhead crane

What it is

A double girder crane has two main girders with a rail on top of each; the hoist trolley runs between them. The hook can rise between the girders, giving maximum lifting height, and the girders carry heavy loads over long spans. A maintenance walkway with handrail gives safe access to the trolley, conductors and drives.

For the heaviest duties World Steel builds open-winch trolleys – drum, gearbox, motor and brakes on a welded frame – in our own workshop.

Structure

• Runway beam – Hot-rolled or built-up steel section
• Crane rail – Railway rail, square bar or flat rail
• End carriage – Channel or box section with buffers at both ends
• Main girder – Single or double; box, I or box + I by span and capacity
• Hoist – Electric wire rope hoist – lift, lower, cross travel
• Cross travel rail – On the girder top (double girder)
• Cross conductor – Festoon cable or conductor rail
• Long travel conductor – Enclosed safety conductor rail

Duty group

Vietnam: cranes are designed, manufactured and inspected to TCVN 4244:2005 and the lifting-equipment safety regulation QCVN 07:2012/BLĐTBXH, with technical inspection before use.